[{"word":"tetrad","phonetic":"/ˈtɛtɹæd/","phonetics":[{"text":"/ˈtɛtɹæd/","audio":""},{"text":"/ˈtɛtɹæd/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A group of four things.","synonyms":["foursome","quartet"],"antonyms":[]},{"definition":"Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.","synonyms":[],"antonyms":[]},{"definition":"A group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.","synonyms":[],"antonyms":[]},{"definition":"A unit of land area of two by two (that is, four) square kilometres.","synonyms":[],"antonyms":[]},{"definition":"A tetravalent atom or radical.","synonyms":[],"antonyms":[]},{"definition":"A group of four basis vectors for a four-dimensional manifold in differential geometry.","synonyms":[],"antonyms":[]}],"synonyms":["foursome","quartet"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/tetrad"]}]